Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Optical high-rate pulse position modulation scheme and optical communications system based thereon

a pulse position and modulation scheme technology, applied in the field of pulse position modulation scheme and optical communication system, to achieve the effect of facilitating the increase of raw data rate and higher data ra

Inactive Publication Date: 2011-12-20
OERLIKON SPACE
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]It is an object of the present invention to provide a communications system for communication between two remote terminals, where even at very long distances between these two terminals and / or at very small signal-to-noise ratios (SNR) a robust communication is possible.
[0010]According to the invention a novel Pulse Position Modulation (PPM) scheme is provided that facilitates the raw data rate to be increased and which also enables obstructed optical channels to carry more data than a conventional PPM channel would be able to convey.

Problems solved by technology

RF technologies just go with a linear increase in electrical signal power when increasing a RF signal pulse peak power into a narrower slot, resulting in no SNR gain, because electrical noise power increases by the same amount due to the higher bandwidth needed.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical high-rate pulse position modulation scheme and optical communications system based thereon
  • Optical high-rate pulse position modulation scheme and optical communications system based thereon
  • Optical high-rate pulse position modulation scheme and optical communications system based thereon

Examples

Experimental program
Comparison scheme
Effect test

implementation examples

Embodiments

[0054]The basic functions of the present invention are now described in the context of a first embodiment. This embodiment of the Laser communication system is schematically illustrated in FIG. 8. As it can be seen on this figure, the Laser communications system 10 comprises a first transceiver 20 and a second transceiver 30 for establishing two optical channels A, B there between.

[0055]Further details of the Laser communication system can be seen on FIG. 9. According to the present invention, the first transceiver 20 comprises a first transmitter T1 with a Laser light source 22 for transmitting optical pulse position modulated signals encoded by the encoder 29 into a first of said optical channels A and further comprising a receiver R1 for receiving the PPM symbols, a photon detector 35 such as a photo diode, a PPM demodulator and a PPM detector 40. FIG. 9 also shows the second transceiver 30 as comprising a second transmitter T2 with a Laser light source 22′ for transmi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

It is an object of the present invention to provide a communications system for communication between two remote terminals, where even at very long distances between these two terminals and / or at very small signal-to-noise ratios a robust communication is possible. The invention achieves the goal set before by suggesting an inventive pulse position modulation scheme and a corresponding optical communications system. The system and method according to the invention are very well suited for communication with a satellite in deep space, for instance.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]The present application claims the priority of the European patent application no. 07 101 803.0 filed 6 Feb. 2007.FIELD OF THE INVENTION[0002]The present invention concerns a pulse position modulation scheme and optical communications systems. The system and method presented herein are very well suited for communication with a satellite in deep space, for instance.BACKGROUND OF THE INVENTION[0003]So far mainly radio frequency (RF) links are used in order to provide for a communication between a ground station and a terminal carried by a satellite in deep space. In such communications systems typically one terminal is attached to the satellite whereas another terminal is either a ground based terminal or a terminal carried aboard of a second satellite in an orbit closer to the earth.[0004]Various researchers and developers, however, are currently developing optical links to support deep-space communication to satellites.[0005]The longer the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(United States)
IPC IPC(8): H04B10/04H04B10/118H04B10/43
CPCH04B14/026H04L25/4902H04L25/4917
Inventor TUCHLER, MICHAEL
Owner OERLIKON SPACE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com